lib/reader: Now returning file content as a string instead of a buffer.
lib/parser: Added value rounding to one decimal place.
test/unit/parser-test: Added parser tests with various temperatures and bad inputs.
examples/temperature-responses.txt: Added a text file with various raw temperature output from built-in raspberry pi driver.
Renamed tests since their subjects changed names.
test/integration/reader-read-test: Updated test to function with what reader.read() does. Also gave all mocked input 'w1_slave' files the same file content for simpler testing.